Composition for and method of coating concrete structures



LUU' (D Patented Sept. 19, 1950 This invention relates to impregnating 4% ms walls and floors or the like of material such crete to render them more resistant to penetration by moisture.

COMPOSITION FOR AND METHOD OF COATING CONCRETE STRUCTURES Knud Aage Faber and Jens Laurits Jensen, Aarhus, Denmark No Drawing. Application January 27, 1948, Serial No. 4,714. In Denmark August 17, 1946 Section 1, Public Law 690, August 8, 1946 Patent expires August 17, 1966 6 Claims. (Cl. 117-169) mmmru 1. In a composition for impregnating or coating walls and floors or the like of material such as masonry or concrete to render them more resistant to penetration by moisture, comprising Walls and floors of masonry or the like are or consisting of 35 to 75% by weight of cement,

sometimes protected against the penetration of moisture by coating them with asphalt or tar or tartaric acid. similar compositions, but such measures have disadvantages in that they may give rise to an 25 to 35% 0f sQdlllm car b onate and 3 to of 0 position according to claim 1, comprising or consisting of approximately 500 parts undesirable odour when used within-doors, or m by weight of cement, 200 parts of sodium carthe compositions may flake off or crack so that the moistunelnawnetmtrth -protectingcoating.

One object of the invention is to provide an improved composition for impregnating or coating walls and floors or the like of masonry or 1.) bonate, 100 parts of pulverised w bonate and 35 parts of tartaric acid.

3. A composition according to claim 1, comprising or consisting of approximately 400 parts by weight of cement, 200 parts of sodium car,-

similar material to render them more resistan parts of magnesium silico-fiuoride, and 100 parts Wow The composition of tartaric acid. cons of materials which are readily and 4. A method of impregnating surfaces of to penetratio cheaply available, and it may be easily applied buildings made of masonry comprising the steps by means of a brush or the like, it has little or of mixing 35 to 75% by weight of powdered no odour, and it also has the same expansion coefiicient as the surfaces to which it is applied so that the resistance to moisture of such surfaces persists over long periods.

cement, to of powdered sodium carbonate and 3 to 15% of powdered tartaric acid; adding water to the mixture to form a soft paste; and applying the paste immediately after making it According to the invention a composition for to the surface to be impregnated. the purpose described comprises or consists of 35 to by weight of cement, 25 to 35% of sodium carbonate, and 3 to 15% of tartaric acid. The m gredients are mixed together in powder 5. A method of impregnating surfaces of buildings made of masonry comprising the steps of mixing approximately 500 parts by weight of powdered cement, approximately 200 parts of form, and when required for use are mixed with :{u powdered sodium carbonate and approximately water to form a soft paste which is applied by means of a brush or in any other suitable manner to the surfaces to be impregnated or coated. The proportions of the ingredients are varied 35 parts of powdered tartaric acid; adding water to the mixture to form a soft paste; and applying the paste immediately after making it to the surface to be impregnated.

according to the degree of moisture of the sur- :1; 6. A method of impregnating surfaces of buildings made of masonry comprising the steps face to be treated.

A composition preferred for treating surfaces subject to a comparatively small degree of moisture is Example 1. parts by weight of cement 200 parts of sodium carbonate and 35 p ture the co ar s o artaric acid; these ingredients are mixed together in powder form, and water is added to form a soft paste for application to the surfaces.

For surfaces subject to a high degree of moissition preferred is as follows:

powdered sodium carbonate, approximately The composition consists of 500 Tarts of pulverized waterglass, approximately 100 parts of powdered magnesium silicofiuoride and approximately 100 parts of powdered tartaric acid: adding water to the mixture to form a soft paste; and applying the paste immediately 4:. after making it to the surface to be impregnated.

\ Example 2. The composition consists of 400 parts by weight of cement, 300 parts of sodium, carbonate, 100 parts of pulverised waterglass 100'? 51:

parts of magnesium silico-fluoride and 100 parts] m of this t of tartaric acid. TH

Flea-m an app e composition is prepared, escribed above.

In all cases the composition is transformed Number Name declare that what we claim is:

KNUD AAGE FABER. JENS LAURITS JENSEN.

REFERENCES CITED The following references are of record in the UNITED STATES PATENTS Date Sept. 26, 1939 FOREIGN PATENTS Date 123,698 Switzerland 1927 

4. A METHOD OF IMPREGNATING SURFACES OF BUILDINGS MADE OF MASONRY COMPRISING THE STEPS OF MIXING 35 TO 75% BY WEIGHT OF POWDERED CEMENT, 25 TO 35% OF POWDERED SODIUM CARBONATE AND 3 TO 15% OF POWDERED TARTARIC ACID; ADDING WATER TO THE MIXTURE TO FORM A SOFT PASTE; AND APPLYING THE PASTE IMMEDIATELY AFTER MAKING IT TO THE SURFACE TO BE IMPREGNATED. 